Real-time Particle Measurement/Fluid Measurement

Summary

Objects of particle measurement include tablets, food granules,
metallic particles, fluorescent particles, biologic cells, and
so on. In this measurement, we need to observe numerous particles
at a time and obtain information of each one such as size, position,
moving velocity and shape. This can be used in still-image-based
inspection and video-based fluid analysis. However, the conventional
ones are mainly based on off-line operation or light scattering data
analysis.

Introduction of high-frame-rate image processing is expected to lead
the expansion in the range of its applications. For example, it enables
to give advantages such as real-time operation, detail observation of
moving particles, increase of number of particles, and high flexibility
by pattern analysis. Here, we show two examples using a high-speed
vision for numerous-point analysis.

Fig. 1 shows the trajectories of particles in a flowing fluid measured at 955 fps.
Fig. 2 and 3 show the results of pattern classification of moving particles with different sizes.